高烈度地震区山岭隧道模型试验研究
|
摘要
以雅泸高速公路高烈度地震区某山岭隧道为背景,对山岭隧道结构地震动力响应进行了大型振动台模型试验研究。试验表明,在隧道洞口段模型土表层裂缝均先从隧道拱顶偏向两侧45°角位置出现,然后斜向向上扩展;在隧道洞身段进出口纵向及斜向裂缝数量较多,大部分裂缝延伸至环向裂缝后终止。在隧道洞身段试验中,拱顶内缘和两侧边墙中部衬砌外缘出现拉裂性裂缝;在仰拱部位出现剪裂性裂缝或压裂性裂缝,并有不同程度的错动,是受地震影响最大的部位。
With a road tunnel in the region of high seismic intensity on Ya'an-Luzhou expressway as the back-ground,a large-scale model test was conducted on a vibration table to study the seismic dynamic responses of the rock tunnel structure.Results indicated,cracks in the surface soil layer of the model on the tunnel entrance ap-peared firstly at positions of 450 to the crown and developed upward along inclined direction.On the portal sec-tions of the tunnel there appeared a lot of longitudinal and oblique cracks,most of them extended and terminated at transverse cracks.On the main tunnel section,tension cracks appeared on internal surface of crown and external surface of side walls at mid-height.Shear cracks and compression cracks appeared in the invert together with dislo-cations.This was the region most severely affected by the quake.
With a road tunnel in the region of high seismic intensity on Ya'an-Luzhou expressway as the back-ground,a large-scale model test was conducted on a vibration table to study the seismic dynamic responses of the rock tunnel structure.Results indicated,cracks in the surface soil layer of the model on the tunnel entrance ap-peared firstly at positions of 450 to the crown and developed upward along inclined direction.On the portal sec-tions of the tunnel there appeared a lot of longitudinal and oblique cracks,most of them extended and terminated at transverse cracks.On the main tunnel section,tension cracks appeared on internal surface of crown and external surface of side walls at mid-height.Shear cracks and compression cracks appeared in the invert together with dislo-cations.This was the region most severely affected by the quake.
引文
[1]王秀英,刘维宁,张弥.地下结构震害类型及机理研究[J].中国安全科学学报,2003,13(3):55～58
[2]邵根大,骆文海,李福庭,等.强地震作用下铁路隧道衬砌耐震性的研究[J].中国铁道科学,1992,(13):92～109
[3]陈国兴,庄海洋,等.土-地铁隧道动力相互作用的大型振动台试验——试验方案设计[J].地震工程与工程振动,2006,26(6):178～183
[4]杨林德,季倩倩,郑永来.软土地铁车站结构的振动台模型试验[J].现代隧道技术,2003,40(1):7～11
[5]邱法维.结构抗震实验方法[M].北京:科学出版社,2000
[6]周德培.强震区隧道洞口段的动力特性研究[J].地震工程与工程振动,1998,18(1):124～130
[7]李育枢.山岭隧道地震动力响应及减震措施研究[D]。同济大学博士学位论文,2006-06
[8]郑永来,杨林德.地下结构震害与抗震对策[J].工程抗震,1999,(4):23～28
[9]季倩倩,杨林德.地下铁道震害与震后修复措施[J].灾害学,2001,16(2):31～37
[2]邵根大,骆文海,李福庭,等.强地震作用下铁路隧道衬砌耐震性的研究[J].中国铁道科学,1992,(13):92～109
[3]陈国兴,庄海洋,等.土-地铁隧道动力相互作用的大型振动台试验——试验方案设计[J].地震工程与工程振动,2006,26(6):178～183
[4]杨林德,季倩倩,郑永来.软土地铁车站结构的振动台模型试验[J].现代隧道技术,2003,40(1):7～11
[5]邱法维.结构抗震实验方法[M].北京:科学出版社,2000
[6]周德培.强震区隧道洞口段的动力特性研究[J].地震工程与工程振动,1998,18(1):124～130
[7]李育枢.山岭隧道地震动力响应及减震措施研究[D]。同济大学博士学位论文,2006-06
[8]郑永来,杨林德.地下结构震害与抗震对策[J].工程抗震,1999,(4):23～28
[9]季倩倩,杨林德.地下铁道震害与震后修复措施[J].灾害学,2001,16(2):31～37
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心